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Response types and general stability conditions of linear aero-elastic system with two degrees-of-freedom
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SYSNO ASEP 0382832 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Response types and general stability conditions of linear aero-elastic system with two degrees-of-freedom Author(s) Náprstek, Jiří (UTAM-F) RID, ORCID, SAI
Pospíšil, Stanislav (UTAM-F) RID, SAI, ORCIDNumber of authors 2 Source Title Journal of Wind Engineering and Industrial Aerodynamics. - : Elsevier - ISSN 0167-6105
Roč. 111, č. 1 (2012), s. 1-13Number of pages 13 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords aero-elastic system ; self-excited vibration ; instability ; aero-elastic derivatives Subject RIV JN - Civil Engineering R&D Projects GA103/09/0094 GA ČR - Czech Science Foundation (CSF) IAA200710902 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) Institutional support UTAM-F - RVO:68378297 UT WOS 000312354600001 EID SCOPUS 84867648706 DOI https://doi.org/10.1016/j.jweia.2012.08.002 Annotation The unified linear variant of the general mathematical description of stability conditions for a girder with a bluff cross-section under the influence of wind flow is presented. A double degree-of-freedom model for the heave and pitch self-excited motion is used. The properties of the response located at the stability limits and the tendencies of the response in their vicinity are analyzed by means of the Routh–Hurwitz theorem. The respective stability conditions are depicted in the frequency plane delimited by the frequencies of two principal aero-elastic modes. Conditions for flutter onset and divergence are identified as special cases of the general theory. The results can be used as an explanation of several experimentally observed effects. The application of this method to real bridges is presented and compared with existing results from other approaches. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2013
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